package stutter.web.app.shared;

/**
 * <p>
 * FieldVerifier validates that the input the user enters is valid.
 * </p>
 * <p>
 * This class is in the <code>shared</code> package because we use it in both
 * the client code and on the server. On the client, we verify that the input is
 * valid before sending an RPC request so the user doesn't have to wait for a
 * network round trip to get feedback. On the server, we verify that the input 
 * is correct to ensure that the input is correct regardless of where the RPC
 * originates.
 * </p>
 * <p>
 * When creating a class that is used on both the client and the server, be sure
 * that all code is translatable and does not use native JavaScript. Code that
 * is note translatable (such as code that interacts with a database or the file
 * system) cannot be compiled into client side JavaScript. Code that uses native
 * JavaScript (such as Widgets) cannot be run on the server.
 * </p>
 */
public class FieldVerifier {

	/**
	 * Verifies that the specified input is valid for our service.
	 * 
	 * Makes sure that the input meets the requirements of the service by not
	 * being null and at least 10 characters in length.
	 * 
	 * @param input the input to validate
	 * @return true if valid, false if invalid
	 */
	public static boolean isValidText(String input) {
		if (input == null) {
			return false;
		}
		return input.length() > 9;
	}
}
